<header>Tables for SENDER addresses</header>

<center><tt>sender_canonical_maps</tt></center>
<hr>

This parameter specifies optional address mapping lookup tables for envelope
and header SENDER addresses.

<p>

By default, no sender-only address mapping is done.

<p>

<tt>$sender_canonical_maps</tt> is used before <tt>$canonical_maps</tt>
lookups.


<hr>
